Synthesis and optical characterization of Er-doped bismuth titanate nanoparticles grown by sol–gel hydrothermal method

S. Fuentes, P. Muñoz, J. Llanos, M. Vega, I. R. Martin, E. Chavez-Angel

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8 Citations (Scopus)

Abstract

© 2016 Elsevier Ltd and Techna Group S.r.l. The Er3+-doped bismuth titanate (Bi4Ti3O12, BIT) nanoparticles were synthesized by a combined sol–gel and hydrothermal method under a partial oxygen pressure of 30 bar. The composition and morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering. They showed pure and homogeneous spherical BIT nanoparticles with a size below the 30 nm. The incorporation of Er ions showed a strong decrease in the lattice parameters, as well as averaged particle size. The photoluminescence up-conversion (excitation wavelength =1480 nm) showed an enhancement of the infrared emission (980 nm) as Er concentration increased, achieving a maximum for 6% mol, while photoluminescence spectra (excitation wavelength =473 nm) showed a strong green emission (529 and 553 nm) with a maximum at 4% mol.
Original languageEnglish
Pages (from-to)3623-3630
JournalCeramics International
Volume43
Issue number4
DOIs
Publication statusPublished - 1 Mar 2017

Keywords

  • Hydrothermal
  • Oxide materials
  • Photoluminescence
  • Sol–gel processes

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